code: def test_str_special_method():
      codec = ScalarCodec(FloatType())
      assert str(codec) == "ScalarCodec(FloatType())"
  
file_path: petastorm/petastorm/tests/test_codec_scalar.py
imports: from decimal import Decimal
  import numpy
  import pytest
  from pyspark.sql.types import StringType, ByteType, ShortType, IntegerType, LongType, DecimalType, BooleanType, FloatType
  from petastorm.codecs import ScalarCodec
  from petastorm.unischema import UnischemaField
label_desc: Use image node_id 12 for calling a global function with example usage: test_str_special_method() without return types